an american giant millipede (a Narceus species in the americanus/annularis complex) traversing a lichen-covered boulder on a mountaintop (Massachusetts, 8/7/23)
Sometimes referred to as “iron worms”, these large millipedes are often locally abundant in mature forests and mountainous areas in the northeastern US. They spend most of their time hidden in decayed logs and leaf litter but regularly emerge to wander in the open, climbing rocks and trees to graze on lichen. Protected by toxins that deter most predators, they do so even in broad daylight, especially during wet or cloudy weather.
@externalscreams submitted: A cool dude I found while hiking with some friends in Kentucky. Seek ID’ed it down to the Narceus genus if that helps. It was the biggest centipede I’ve seen in my life so far!
Yes, it’s a Narceus americanus complex millipede, not a centipede! Centipedes are fast predators and millipedes just slowly trundle along and eat decaying plant matter :) I’m rather surprised this dude is just hanging out on a tree (?) in full sun, they like it damp and dark.
I was giving the arthropods some carrots and other foods and opened the millipede container to see little babies crawling around on the bark I have in there!
It's so cool how transparent they are!
One of them next to their assumed father haha!
So exciting to see that the millipedes are doing so well, I was a little worried after I didn't see any of the adults for a few weeks but they were probably just molting or hanging out under the soil.